Platte County, Missouri
Everything a Platte County, Missouri voter needs in one place: registration, voter ID, absentee and early voting, and your sample ballot. Home to about 113,000 people, Platte County ranks 11th in population among Missouri's 115 counties. In Missouri, elections are run by local election authorities: the county clerk in most counties, or a board of election commissioners in several cities and counties.
Next Election
August 8, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register by the fourth Wednesday before an election.
Why Voting Matters
In Platte County, the people who show up to vote decide who represents everyone. The next election for Platte County voters is Missouri's state primary on August 8, 2028; local elections can come sooner, so check your local election office. With retail and restaurants and hospitality among the county's biggest employers, issues like local businesses are decided by the officials voters choose.
In the 2024 presidential election, about 57,800 ballots were cast in Platte County, about the same as the 57,300 cast in 2020. With roughly 88,400 adults living in the county, that is around 65% of adult residents, above the statewide rate of about 61%.
That means roughly 30,600 adult residents did not cast a presidential ballot. Some are not eligible, but many are, and that is a lot of untapped power. If just one in 20 of them voted, Platte County would add about 1,530 voices, more than enough to decide a close local race.
Across about 420 square miles, Platte County averages around 269 people per square mile, mixing neighborhoods, towns and open land. The county is home to about 1.8% of Missouri's population.
ZIP codes in or partly in Platte County include 64018, 64028, 64079, 64089, 64092, 64098, 64118 and 64133, plus 15 more. Confirm your registration, read through your sample ballot before Election Day, and choose whether you will vote early, by mail or in person. Invite someone you know in Platte County to join you.
Voter Assistance Resources
Local election help in Platte County: In Missouri, elections are run by local election authorities: the county clerk in most counties, or a board of election commissioners in several cities and counties. For registration, polling places, early voting and absentee ballots, contact the Platte County local election authority (county clerk or board of election commissioners).
Statewide directory, Missouri Secretary of State elections division:
https://www.sos.mo.gov/elections/
See your sample ballot. Missouri Secretary of State elections division (voter lookup shows sample ballots):
https://www.sos.mo.gov/elections/
You can also preview a personalized ballot at Vote411.org.
Free, nonpartisan help is available before and on every Election Day: call or text the Election Protection hotline at 866-OUR-VOTE (866-687-8683). Spanish: 888-VE-Y-VOTA (888-839-8682). Asian languages: 888-API-VOTE (888-274-8683).
Voters with disabilities in Platte County can ask for an accessible voting machine, curbside voting where offered, and help from a person of their choice. If you run into barriers, contact Missouri Protection & Advocacy, Missouri's Protection and Advocacy agency, at (573) 893-3333. VoteRiders (844-338-8743) offers free help with voter ID.
Need a ride? Many local transit agencies and ride services offer free or discounted rides to the polls on Election Day, so check what is available before the next election. See our Missouri voter page for statewide options. Details can change, so confirm with the official election office.
Military and overseas voters can get help from the Federal Voting Assistance Program at 1-800-438-VOTE (8683) or fvap.gov.
Sign up to be an election worker
Election workers (often called poll workers) keep voting running smoothly in Platte County. Most are paid for their time, get free training, and help their neighbors cast their ballots. You can work a full day, a shorter shift, or help before Election Day. County and municipal election offices recruit and train their own workers, and the EAC's Help America Vote page links to yours. Find out how to sign up:
https://www.eac.gov/help-america-vote
Take the Next Step
Find volunteer opportunities, visit the voting resources page, or shop sustainable products.
Buy the book that led to the creation of this website: Peace is Active by Tom McCann
Share what you’re doing for peace on social media with #peaceisactive